Natural products-based insecticidal agents 5. Design, semisynthesis and insecticidal activity of novel 4'-substituted benzenesulfonate derivatives of 4-deoxypodophyllotoxin against Mythimna separata Walker in vivo

Abstract

In an attempt to find the effective phytopesticides, eight novel 4'-substituted benzenesulfonate derivatives of 4-deoxypodophyllotoxin were synthesized and preliminarily tested against the pre-third-instar larvae of Mythimna separata Walker in vivo at the concentration of 1mg/mL. Among all of the tested analogs, compounds 5a, 5c, 5d, and 5h showed the higher insecticidal activity than 4-deoxypodophyllotoxin. Especially 5a exhibited the most potent insecticidal activity compared with toosendanin, a commercial insecticide derived from Melia azedarach.